bind 9 problem with delegation

[gui]

hello,

i have s strange probleme with my bind server, and i hope someone
could point out the problem, here is the description,

i have two bind servers (replication, multi-master), bind 9.3.4, same
version, same configuration (normally).
I tried to do some PTR delegation, so for example, i have a 104.10.in-
addr.arpa zone, the master of the zone is my bind server, in this zone
file i have this :

0.104.10.in-addr.arpa.    IN    NS         otherDNSserver.fqdn

on the first server, when i check with dig :
 i get nothing :

dig 0.104.10.in-addr.arpa :

; <<>> DiG 9.3.4-P1.1 <<>> 0.104.10.in-addr.arpa
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 60811
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;0.104.10.in-addr.arpa.         IN      A

;; Query time: 108 msec
;; SERVER: 10.x.x.x#53(10.x.x.x)
;; WHEN: Fri Jul 10 17:17:52 2009
;; MSG SIZE  rcvd: 39


on the other one, it works :


; <<>> DiG 9.3.4-P1.1 <<>> 0.104.10.in-addr.arpa
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 58295
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;0.104.10.in-addr.arpa.         IN      A

;; AUTHORITY SECTION:
0.104.10.in-addr.arpa.  3600    IN      SOA     myotherdnsserver.fqdn.
hostmaster.myotherserver.fqdn. 310 900 600 86400 3600

;; Query time: 4005 msec
;; SERVER: 10.2.129.9#53(10.2.129.9)
;; WHEN: Thu Jul 23 09:03:51 2009
;; MSG SIZE  rcvd: 113


and i can't find what to do to make this work correctly on the first
server....

hope you'll have more ideas than me :-))

thank you !